1.	Simplify 1 Simplify the following expression: $$ \left(-3 + -5\right)\left(-4 + 4\right) - {\left(4 + 1\right)}^{2} $$ Correct Answer $$ -25$$ or -25.0000

2.	Simplify 2 Simplify the following expression: $$ \frac{-3}{-5} - -3\times3 + {\left(\frac{-2}{2}\right)}^{2} $$ Correct Answer $$ \frac{53}{5}$$ or 10.6000

3.	Fractions 1 Simplify the following expression: $$ \frac{3}{2} + \frac{3}{6} $$ Correct Answer $$ 2$$ or 2.0

4.	Fractions 2 Simplify the following expression: $$ \frac{5}{2}\frac{3}{4} $$ Correct Answer $$ \frac{15}{8}$$ or 1.875

5.	Significant figures 1. Write the following to 2 significant figures: 1.4964458 Correct Answer 1.5 or $$1.5\times10^{0}$$ 2. Write the following to 4 significant figures: 17.214793 Correct Answer 17.21 or $$1.721\times10^{1}$$

6.	Standard Form 1. Write the following in standard form to 5 significant digits: 0.000123079 Correct Answer $$1.2308\times10^{-4}$$ 2. Write the following in standard form to 2 significant digits: 275.512 Correct Answer $$2.8\times10^{2}$$

7.	Significant figures 1. Write the following in preferred standard form to 2 significant digits: 122400 Correct Answer $$120\times10^{3}$$ 2. Write the following in preferred standard form to 4 significant digits: 0.0000000766827 Correct Answer $$76.68\times10^{-9}$$

8.	Simplify 2 Simplify the following expression: $$ \frac{-4(-5) - \frac{-1}{-4}}{2\frac{3}{-6}} $$ Correct Answer $$ \frac{-79}{4}$$ or -19.7500

9.	Simplify 1 Simplify the following expression: $$ {\left(-2 - -4\right)}^{2} + \left(-6 - 1\right)\left(6 + -2\right) $$ Correct Answer $$ -24$$ or -24.0000

10.	Simplify 2 Simplify the following expression: $$ \left(4 - 3\right){(-2)}^{-2} + {\left(\frac{-3}{-2}\right)}^{2} $$ Correct Answer $$ \frac{5}{2}$$ or 2.50000